package com.lidsu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;

import com.lidsu.common.constant.AuthServerConstant;
import com.lidsu.common.exception.BizCodeEnume;
import com.lidsu.common.utils.R;
import com.lidsu.common.vo.MemberRespVo;
import com.lidsu.gulimall.auth.feign.MemberFeignService;
import com.lidsu.gulimall.auth.feign.ThirdPartFeignService;
import com.lidsu.gulimall.auth.vo.UserLoginVo;
import com.lidsu.gulimall.auth.vo.UserRegistVo;
import io.netty.util.internal.StringUtil;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.net.Authenticator;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {
    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMvc viewcontroller 将请求和页面映射过来
     *
     */
    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @PostMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){
        //TODO 1.接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis()-l<60000){
                //60s不能再发验证码
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //2.验证码的再次校验
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60s秒内再次发送验证码

        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,subString,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    /**
     * TODO 重定向携带数据，利用session原理。将数据放到session中
     * 只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
     * TODO 1.分布式下的session问题
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo , BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
            //Map<String,String> errors = new HashMap<>();
            //result.getFieldErrors().stream().map(fieldError->{
            //    String field = fieldError.getField();
            //    String defaultMessage = fieldError.getDefaultMessage();
            //    errors.put(field,defaultMessage);
            //    return
            //});
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错转发到注册页面
            return "redirect:http://auth.lidsu.icu/reg.html";
        }
        //真正注册，调用远程服务进行注册
        //校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                //删除验证码:令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过 真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if(r.getCode()==0){
                    //成功

                    return "redirect:http://auth.lidsu.icu/login.html";
                }else{
                    HashMap<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.lidsu.icu/reg.html";
                }

            }else{
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.lidsu.icu/reg.html";
            }
        }else{
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.lidsu.icu/reg.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute==null){
            return "login";
        }else{
            return "redirect:http://lidsu.icu";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){
        //远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode()==0){
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功方法session中
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://lidsu.icu";
        }else{
            Map<String,String> errors=new HashMap<>();
            errors.put("msg", login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.lidsu.icu/login.html";
        }
    }


}
